0.0
NA
CVE-2025-21871
OP-TEE Linux Kernel Hang-Up Vulnerability
Description

In the Linux kernel, the following vulnerability has been resolved: tee: optee: Fix supplicant wait loop OP-TEE supplicant is a user-space daemon and it's possible for it be hung or crashed or killed in the middle of processing an OP-TEE RPC call. It becomes more complicated when there is incorrect shutdown ordering of the supplicant process vs the OP-TEE client application which can eventually lead to system hang-up waiting for the closure of the client application. Allow the client process waiting in kernel for supplicant response to be killed rather than indefinitely waiting in an unkillable state. Also, a normal uninterruptible wait should not have resulted in the hung-task watchdog getting triggered, but the endless loop would. This fixes issues observed during system reboot/shutdown when supplicant got hung for some reason or gets crashed/killed which lead to client getting hung in an unkillable state. It in turn lead to system being in hung up state requiring hard power off/on to recover.

INFO

Published Date :

March 27, 2025, 2:15 p.m.

Last Modified :

March 27, 2025, 4:45 p.m.

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Remotely Exploitable :

No

Impact Score :

Exploitability Score :

Affected Products

The following products are affected by CVE-2025-21871 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-21871.

URL Resource
https://git.kernel.org/stable/c/0180cf0373f84fff61b16f8c062553a13dd7cfca
https://git.kernel.org/stable/c/21234efe2a8474a6d2d01ea9573319de7858ce44
https://git.kernel.org/stable/c/3eb4911364c764572e9db4ab900a57689a54e8ce
https://git.kernel.org/stable/c/70b0d6b0a199c5a3ee6c72f5e61681ed6f759612
https://git.kernel.org/stable/c/c0a9a948159153be145f9471435695373904ee6d
https://git.kernel.org/stable/c/d61cc1a435e6894bfb0dd3370c6f765d2d12825d
https://git.kernel.org/stable/c/ec18520f5edc20a00c34a8c9fdd6507c355e880f
https://git.kernel.org/stable/c/fd9d2d6124c293e40797a080adf8a9c237efd8b8

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-21871 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2025-21871 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Mar. 27, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: tee: optee: Fix supplicant wait loop OP-TEE supplicant is a user-space daemon and it's possible for it be hung or crashed or killed in the middle of processing an OP-TEE RPC call. It becomes more complicated when there is incorrect shutdown ordering of the supplicant process vs the OP-TEE client application which can eventually lead to system hang-up waiting for the closure of the client application. Allow the client process waiting in kernel for supplicant response to be killed rather than indefinitely waiting in an unkillable state. Also, a normal uninterruptible wait should not have resulted in the hung-task watchdog getting triggered, but the endless loop would. This fixes issues observed during system reboot/shutdown when supplicant got hung for some reason or gets crashed/killed which lead to client getting hung in an unkillable state. It in turn lead to system being in hung up state requiring hard power off/on to recover.
    Added Reference https://git.kernel.org/stable/c/0180cf0373f84fff61b16f8c062553a13dd7cfca
    Added Reference https://git.kernel.org/stable/c/21234efe2a8474a6d2d01ea9573319de7858ce44
    Added Reference https://git.kernel.org/stable/c/3eb4911364c764572e9db4ab900a57689a54e8ce
    Added Reference https://git.kernel.org/stable/c/70b0d6b0a199c5a3ee6c72f5e61681ed6f759612
    Added Reference https://git.kernel.org/stable/c/c0a9a948159153be145f9471435695373904ee6d
    Added Reference https://git.kernel.org/stable/c/d61cc1a435e6894bfb0dd3370c6f765d2d12825d
    Added Reference https://git.kernel.org/stable/c/ec18520f5edc20a00c34a8c9fdd6507c355e880f
    Added Reference https://git.kernel.org/stable/c/fd9d2d6124c293e40797a080adf8a9c237efd8b8
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-21871 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-21871 weaknesses.

NONE - Vulnerability Scoring System
: